Jarring apparatus for packing granular materials.



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H. TSGHERNING. JARRING APPARATUS FOR PACKING GRANULAR MATERIALS. APPLICATION FILED JUNE 17, 1912.

Patented July 7, 1914,.

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HENRY TSCHERNING, OF FRI EEPORT, ILLINOIS, ASSIGNOR TO ARCADE MANUFAC- TURING COMPANY. OF FREEPORT, ILLINOIS, A CORPORATION OF ILLINOIS.

JABRING APPARATUS FOR PACKING GRANULAR MATERIALS.

Patented July 7, 1914.

Serial No. 704,092.

To all :whom it may concern:

Be it known that I, HENRY TSGHERNING, a

citizen of the United States, residing at Freeport, in the county of Stephenson and State of Illinois, have invented certain new and useful Improvements in J arring Apparatus for Packing Granular Materials, of which the following is a specification, reference being had therein to theaocompanying drawing.

This invention relates to jarring andthereby packing granular material and the flange proper.

apparatus embodying the invention and shown in the accompanying drawings is especially adapted for packing molding sand about the patterns in molding flasks, the flask being raisedby compressed air or the like, released, and then abruptly arrested in its falling movement.

In the accompanying drawings, Figure 1 shows my devices partly in side elevation, partly in section, the plane of section being indicated on Fig. 2 by the line 1-1, Fig. 2 is a section on the line 22, Fig. 1, and Fig. 3 is a section on the line 3-3, Fig. 2. Fig. 4 is a. section on the line 44, Fig. 3..

In these figures, A represents a strong cylinder'having a base A and heavy external ribs At'extending to its open upper end. In the cylinder wall is formed an inlet passage A opening outwardly at some distance above the base and inwardly at the bottom of the cylinder. In the lower part of the cylinder is a curved chamber A communieating with the interior of the cylinder-by a circumferential slot, as indicated by dotted lines in Fig. 2, and with anlexhaust pipe A. In the cylinder works a piston B provided at its upper end with a broad and heavy flange B normally resting upon the upper ends of the ribs, the actuali contact being made by a renewable ring B or the like, lying in a recess in the. lower face of the The piston supports a molding table B upon which the molding flask is placed. At the lower end of the piston is a plate B which is freely movable vertically on the shaft of a central vertical screw 13 working in the lower end of the piston. This plate is provided with vertical perforations 13 and with a peripheral groove in which is loosely seated an internal rib B on a broken ring B of spring metal which by its resiliency always presses against the cylinder wall with such force as to resist gravity and-which covers the outlet to the sage D intothe cylinder D chamber A". All the parts at the lower end a of the piston are so placed that they do not prevent the piston flange from resting upon the cylinder ribs.

The piston is actuated by compressed air, or the like, brought from any convenient source by a pipe C provided with a-hand valve C and leading to automatic valve mechanism in a casing D upon the cylinder A. This casing contains two chambers D, D into which, respectively, lead passages D"..D from the pipe C. The chambers D and D are connected at top and bottom by passages D, D, and the casihg is further provided, in this instance at a point directly opposite the passage D* with a channel D in open communication with the passage A in the walls of the cylinder A. In the cylinder D slides a heavy free piston E having a central, circumferential groove E, the arrangement being such that when this piston is at its lowest point, where its weight normally holds it, the passage D is closed and the ports of D, D" are uncovered, while if the piston is raised to its highest point the passage D communicates with the groove E and through it with the channel D, In the cylindrical chamber D works a piston valve F, always urged toward its highest position by a springF and having a stem F projecting through the top of the casing and provided with a shoulder F which limits its upward movement. This valve is centrally diminished to form an annular chamber F into which the passage D opens. Upon the upper end of the piston valve stem normally rests an adjustable rod B projecting downward from the flange B, and thelength of the rod is such that when the flange rests upon the ribs of the main cylinder, the weight of the parts holds the spring F compressed and keeps the piston valve depressed so that the flow of fluid from the chamber F to the passageD is pre vented, while the passages D and D are both open and in communication.

If the hand valve V be opened. compressed fluid passes through the passage D (D being closed by the piston E) into the valve recess F, and thence through the paswhere it raises the pitson E, bringing the passage E into registry with the passages D, D and thus allowing the fluid to pass through the channel A to the interior of the cylinder A, through the perforations in the plate B, and

into the narrow chamber between the piston and the plate B", which is always held away from the body of the piston by suitable projections B As this piston begins to rise it withdraws from the plate but after it has ascended through a short distance, the head of the screw picks up the plate and this as it rises picks up the ring B and thus uncovers the exhaust slot allowing sudden discharge into the circular chamber and aslower discharge through the pipe A \Vhen this occurs, the piston and flask table fall until they are suddently arrested by the impact of the piston flange upon the ribs of the cylinder. But as soon as the main piston rises, the spring F forces the valve F to follow, cutting oil the actuating fluid from the passage D, opening this passage to the exhaust passages Q, and then opening the passage D to the actuating fluid so that the latter may enter the space above the piston E, and thus the latter is restored to initial position. But the falling of the main piston and its flange pushes the valve F again downward, against the force of the spring, and thereby opens the passage D to the exhaust Q and again admits fluid to the passage D. This cycle of operations is repeated rapidly and indefinitely so long as the valve C is allowed to remain open.

The distance through which the piston falls may obviously be made as greator small asdesired, and by placing the distinct impact member outside the cylinder wear may be readily observed and compensated. By having the impact at several points the blow is divided, by impact beneath widely separated points of the table, the work is better done, and by having the impact at the upper end of the cylinder on heavy vertically continuous metal extending to the base, a better effect is obtained for a given weight of the cylinder.

What I claim is:

1. In apparatus of the class described, the combination with an upright cylinder having below an inlet port and an exhaust port, of a jarring piston arranged for reciprocating in saidcylinder and provided with a lateral projection to engage the cylinder and abruptly arrest the downward movement of the piston before it reaches the bottom of the cylinder, an independently movable member carried by the piston for closing and opening the exhaust port, and automatic devices operating in time with the piston to admit actuating fluid through said inlet port.

2. The combination with a vertical cylinder provided with an inlet port, with a circumfer'ential chamber communicating with the interior of the cylinder through a broad circumferential slot and with an outwardly extending exhaust passage, of a piston ar nioaae? ranged to open and close said slot in reciprocating, and automatic means for supplying actuating inlet port.

fluid intermittently through said Y 3. The combination with a cylinder proweight and that of the plate by frictional engagement with the interior of the cylinder, and automatic means for intermittently admitting fluid under pressure at said inlet port.

4-. The combination with a cylinder having below inlet and exhaust ports, of a piston workingin the cylinder, independently movable means carried by the piston for opening and closing the exhaust port. automatic valve mechanism for securing admission of actuating fluid intermittently in time with the piston movements, and manually operated means for arresting the movements of the valve mechanism.

5. The combination with a cylinder having below inlet and exhaust ports, of a jarring piston working in the cylinder, means within the cylinder whereby the piston alternately opens and closes the exhaust, an external valve mechanism, allowing. operating fluid to pass to the inlet periodically, comprising a reciprocating valve governing the inlet passage and a second valve normally allowing fluid to pass to the first valve, and means whereby rising of the piston causes the shifting of both valves cutting off the fluid, while the descent of the piston again shifts both valves to initial position.

6. The combination with a cylinder ha v ing inlet and exhaust ports below, of a piston carrying at its lower end an independently movable member-for opening and closing the exhaust, a reciprocating valve actuated by the motor fluid and controlling the admission of the latter to the cylinder, a second reciprocating valve controlling the supply of fluid to the first valve, piston operated means whereby the second valve is held open while the piston is at and near the lower limit of its path, and a spring urging'the second valve toward closed position.

In testimony whereof I aflix my signature in presence of two witnesses.

HENRY TSCHERNING.

Witnesses E. H. MORGAN,

1; ill. MUNN, Jr. 

